• $3 Chocolate Milkshakes In App Only. No Limit. To redeem this offer your order must include a chocolate milkshake. Once added to your order each will be priced at $3. Offer Available Only in the Patty Perks App. Valid Friday, September 12th, 2025.
  • It's National Cheeseburger Day, Thursday, September 18th! Enjoy $4 Cheesys When you Use The Patty Perks App To Earn Loyalty.
  • black pepper seasoned angus beef patty, Swiss, applewood smoked bacon, sour cream horseradish, arugula, tomato, toasted brioche bun
  • creamy vanilla ice cream, nellie and joe's® key lime juice, graham cracker crumbles, fluffy whipped cream, lime wheel
  • September Free Fridays Features a Free Side Fry With Any Burger Purchase Made In-Store. (1) Free Side French Fry with Burger Purchase for each Transaction. Offer Valid Only On Friday, September 5, 12, 19, + 26, 2025. Offer Only Available at Participating Locations.
  • rich peanut butter flavor combines with soft chewy centers + crispy edges to give these cookies the perfect balance of salty + sweet. For a limited time only.
  • 100 Bonus Points on your entire purchase made with your patty perks loyalty account on the 21st of Every Month!
  • Every Wednesday get a cheesy and fries combo meal special!
  • Order online or in the B21 app for Burger 21 delivery!
  • Download the patty Perks app To Earn Rewards
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